TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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15 Cylinder head oil drain fluid passage bolt 16 Left bank front oil pan inlet drain tube 17 Left bank rear oil pan drain tube 18 Leſt bank rear cylinder head oil drain tube assembly 19 Rear oil pan inlet drain tube hexagon head capscrew 20 Left bank lurbosuperchargcr oil drain tube 21 Right bank rear oil pan drai n tube 22 Right bank turbosupercharge1· oil drain Lube Figio·e 9-7. Cylimlc�· head oil druin tubes cu1d associated pats - explodecl view -Continued c. Oil Filler and Oil Level Indicator Titbe (1) Remove oil filler tube extension helical spring (9, fig. 3-275). Do not remove two externally relieved body screws (8) unless inspection (para 3-12) indicates replacement is necessary. Screws are staked in place. Remove and discard oil filler cap preformed packing (4). (2) Remove two machine bolts (34) securing assembled oil gage cap to left front upper cover(32) and remove assembled oil gage cap cover. Remove and discard oil level indicator neck gasket (22). Remove and discard two oil level indicator neck preformed packings (21). Remove oil gage tube hel- ical extension spting (25). Remove and discard oil level indicator tube cap preformed packing(24). Do not remove two externally relieved screws (8) un- less inspection(para 3-126c) indicates replacement is necessary. Bolts are staked in place. 3-125. Cleaning Refer to paragraph 3-36. 3-126. Inspection and Repair I a. Inspect cylinder head oil drain tube assem- ·TM 9-2815-220-34 blics for cracks, broken welds and deformation. I Tube assemblies shall not leak when subjected to 25 pounds inteal air pressure when submerged in water (fig. 3-274). Refer to paragraph 3-37 and 3-38 for general inspection requirements. b. Inspect exhaust manifolds for cracks, broken welds, damaged bellows and bent flanges. c. Inspect externally relieved screws (6 and 32, figure 3-275) for looseness or damaged shoulder area. 3-127. Assembly a. Oil Fille1· ancl Oil Level iclor Tube. (1) If necessary, install two new extemally - lieved body screws(8, fig. 3-275) and stake in place. Install oil level indicator tube cap preformed pack- ing(24). Install extension helical spri ng(25). Install two new preformed packings (21) on oil gage t·od tube neck (23). Using a new gasket (22), install assembled oil gage cap on left front upper cover(32) and secure with two machine bolts (33). (2) Install new oil filler cap preformed packing (4) in oil filler tube cap(5). If necessai-y, install two new externally relieved body screws (8) and stake in place. Install oil filler tube cap extension helical spring (9). _ b. Cylinde>· Head Oil Drain Tubes. Loosely install hose clamps (1, figure 3-274) on hoses (4) and con- nect rear cylinder head oil drain tube (2), four in- termediate cylinder head oil drain tubes (3), right front oil drain manifold tube (5), right front cylin- der head oil drain tube (6) and right bank oil pan inlet drain tube (7). Loosely install hose clamps (1) on hoses (4) and connect turbosupercharger oil drain tube (22) and right rear cylinder head oil drain tube (21). c. Exhaust Manifolds. Exhaust manifolds will be assembled during engine assembly. Change 3 3·181